5.15-stable review patch. If anyone has any objections, please let me know.
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From: Salah Triki salah.triki@gmail.com
commit 25f526507b8ccc6ac3a43bc094d09b1f9b0b90ae upstream.
platform_get_resource() returns NULL in case of failure, so check its return value and propagate the error in order to prevent NULL pointer dereference.
Fixes: 6305166c8771 ("bus: fsl-mc: Add ACPI support for fsl-mc") Cc: stable@vger.kernel.org Signed-off-by: Salah Triki salah.triki@gmail.com Acked-by: Ioana Ciornei ioana.ciornei@nxp.com Link: https://lore.kernel.org/r/aKwuK6TRr5XNYQ8u@pc Signed-off-by: Christophe Leroy christophe.leroy@csgroup.eu Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/bus/fsl-mc/fsl-mc-bus.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/bus/fsl-mc/fsl-mc-bus.c +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c @@ -1169,6 +1169,9 @@ static int fsl_mc_bus_probe(struct platf * Get physical address of MC portal for the root DPRC: */ plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!plat_res) + return -EINVAL; + mc_portal_phys_addr = plat_res->start; mc_portal_size = resource_size(plat_res); mc_portal_base_phys_addr = mc_portal_phys_addr & ~0x3ffffff;